<?php

/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */

/**
 * Short description for file
 *
 * Long description for file (if any)...
 *
 * PHP version 5
 *
 * Copyright 2008 The Picnic PHP Framework
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * @category      Framework
 * @package       Pfw
 * @author        Sean Sitter <sean@picnicphp>
 * @copyright     2008 The Picnic PHP Framework
 * @license       http://www.apache.org/licenses/LICENSE-2.0
 * @link          http://www.picnicphp.com
 * @since         0.10
 */

Pfw_Loader::loadClass('Pfw_Exception_Script');
Pfw_Loader::loadClass('Pfw_Script_FileSystem');

class Pfw_Script_Migration
{
    const TYPE_CREATE = 'create';
    const TYPE_ALTER  = 'alter';
    const TYPE_DROP  = 'drop';

    public static function getNextFilename($table, $migration_type, $adapter = 'mysql')
    {
        global $_PATHS;
        $files = Pfw_Script_FileSystem::getFilesInDir($_PATHS['deltas']);

        $next_int = 0;
        $matches = array();
        foreach ($files as $file) {
            if(preg_match('/(\d+)-.*?\.sql/', $file, $matches)){
                if(intval($matches[1]) > $next_int){
                    $next_int = $matches[1];
                }
            }
        }

        $next_int += 1;
        $deltas_path = rtrim(rtrim($_PATHS['deltas'], '/'), "\\\\");
        $ds = DIRECTORY_SEPARATOR;

        return "{$deltas_path}{$ds}{$next_int}-{$adapter}-{$table}_{$migration_type}.sql";
    }
}
